Q.How To Save My Magnolia
I planted a Magnolia Ricki about a year ago and this year it bloomed partially. I didn’t think anything about it and as time went on I noticed this white stuff on it. I looked it up and found it was called Scale and I needed to spray it with Neem oil. So I did and there’s leaves dying off and the scale keep growing. Am I going to be able to save the bush or is it just going to die? The scale keep spreading more and branches keep dying. This was a expensive item to let die off. The place I bought it from just told me to use fertilizer spikes and water it. I told them the scale kept spreading but nothing.

You may need to treat more aggressively.
These links will help you!
https://www.canr.msu.edu/news/check_magnolias_for_magnolia_scale_now
https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm